51, sec02-21 Choice A is phrased illogically in that it says the young adults in the 1979 survey somehow doubled the people in the 1977 survey, not that the number of young adults using cocaine doubled. The infinitive to double, used unidiomatically in B, carries the sense of in order to double. Again in choice C, twice the number would be preferable to twice those(people).It is not clear in choice D whether twice as much… refers to the number of young adults using cocaine in 1979 or the amount of cocaine they used. Choice E is best for this moderately easy question. http://forum.chasedream.com/dispbbs.asp?BoardID=23&replyID=507214&id=58255&skin=0
http://forum.chasedream.com/dispbbs.asp?BoardID=23&replyID=207536&id=28117&skin=0
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